Polymeric binuclear ruthenium complex as efficient electrocatalyst for oxygen evolution reaction

Tiago A. Matias; André L.A. Parussulo; Paola A. Benavides; Robson R. Guimarães; André H.B. Dourado; Marcelo Nakamura; Susana I.Córdoba de Torresi; Mauro Bertotti; Koiti Araki

doi:10.1016/j.electacta.2018.06.138

Polymeric binuclear ruthenium complex as efficient electrocatalyst for oxygen evolution reaction

Tiago A. Matias, André L.A. Parussulo, Paola A. Benavides, Robson R. Guimarães, André H.B. Dourado, Marcelo Nakamura, Susana I.Córdoba de Torresi, Mauro Bertotti, Koiti Araki

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13 Scopus citations

Abstract

A robust polymeric material constituted by chains of binuclear aqua ruthenium terpyridylphenanthroline complexes connected through benzene ring meta-positions, exhibiting an unusual two electrons and two protons PCET (proton-coupled electron transfer) process and enhanced oxygen evolution reaction (OER) activity, is described. The catalytic active [Ru^V[dbnd]O] species is generated at potentials more positive than +1.5 V (NHE) in the poly-[{Ru(H₂O)(phen)}₂(tpy₂ph)] film, as confirmed by the rise of the ruthenyl (Ru^V[dbnd]O) stretching band at 810 cm⁻¹ in the Raman spectrum, and the clear change to a higher activity regime as confirmed by EIS. Faradaic efficiency for OER as high as 39% was achieved at +1.8 V, indicating that poly-[{Ru(H₂O)(phen)}₂(tpy₂ph)] is one of the most active ruthenium terpyridine complexes ever prepared. The synthesis and characterization of the monomeric binuclear [{RuCl(Clphen)}₂(tpy₂ph)]²⁺ and its respective [{Ru(H₂O)(Clphen)}₂(tpy₂ph)]⁴⁺ aqua complex are also fully described.

Original language	English
Pages (from-to)	18-26
Number of pages	9
Journal	Electrochimica Acta
Volume	283
DOIs	https://doi.org/10.1016/j.electacta.2018.06.138
State	Published - 1 Sep 2018
Externally published	Yes

Keywords

Binuclear catalyst
Electrocatalysis
High valence complex
Modified electrodes
Oxygen evolution reaction
Ruthenium complex

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10.1016/j.electacta.2018.06.138

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title = "Polymeric binuclear ruthenium complex as efficient electrocatalyst for oxygen evolution reaction",

abstract = "A robust polymeric material constituted by chains of binuclear aqua ruthenium terpyridylphenanthroline complexes connected through benzene ring meta-positions, exhibiting an unusual two electrons and two protons PCET (proton-coupled electron transfer) process and enhanced oxygen evolution reaction (OER) activity, is described. The catalytic active [RuV[dbnd]O] species is generated at potentials more positive than +1.5 V (NHE) in the poly-[{Ru(H2O)(phen)}2(tpy2ph)] film, as confirmed by the rise of the ruthenyl (RuV[dbnd]O) stretching band at 810 cm−1 in the Raman spectrum, and the clear change to a higher activity regime as confirmed by EIS. Faradaic efficiency for OER as high as 39% was achieved at +1.8 V, indicating that poly-[{Ru(H2O)(phen)}2(tpy2ph)] is one of the most active ruthenium terpyridine complexes ever prepared. The synthesis and characterization of the monomeric binuclear [{RuCl(Clphen)}2(tpy2ph)]2+ and its respective [{Ru(H2O)(Clphen)}2(tpy2ph)]4+ aqua complex are also fully described.",

keywords = "Binuclear catalyst, Electrocatalysis, High valence complex, Modified electrodes, Oxygen evolution reaction, Ruthenium complex",

author = "Matias, {Tiago A.} and Parussulo, {Andr{\'e} L.A.} and Benavides, {Paola A.} and Guimar{\~a}es, {Robson R.} and Dourado, {Andr{\'e} H.B.} and Marcelo Nakamura and {de Torresi}, {Susana I.C{\'o}rdoba} and Mauro Bertotti and Koiti Araki",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

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doi = "10.1016/j.electacta.2018.06.138",

language = "English",

volume = "283",

pages = "18--26",

journal = "Electrochimica Acta",

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TY - JOUR

T1 - Polymeric binuclear ruthenium complex as efficient electrocatalyst for oxygen evolution reaction

AU - Matias, Tiago A.

AU - Parussulo, André L.A.

AU - Benavides, Paola A.

AU - Guimarães, Robson R.

AU - Dourado, André H.B.

AU - Nakamura, Marcelo

AU - de Torresi, Susana I.Córdoba

AU - Bertotti, Mauro

AU - Araki, Koiti

PY - 2018/9/1

Y1 - 2018/9/1

N2 - A robust polymeric material constituted by chains of binuclear aqua ruthenium terpyridylphenanthroline complexes connected through benzene ring meta-positions, exhibiting an unusual two electrons and two protons PCET (proton-coupled electron transfer) process and enhanced oxygen evolution reaction (OER) activity, is described. The catalytic active [RuV[dbnd]O] species is generated at potentials more positive than +1.5 V (NHE) in the poly-[{Ru(H2O)(phen)}2(tpy2ph)] film, as confirmed by the rise of the ruthenyl (RuV[dbnd]O) stretching band at 810 cm−1 in the Raman spectrum, and the clear change to a higher activity regime as confirmed by EIS. Faradaic efficiency for OER as high as 39% was achieved at +1.8 V, indicating that poly-[{Ru(H2O)(phen)}2(tpy2ph)] is one of the most active ruthenium terpyridine complexes ever prepared. The synthesis and characterization of the monomeric binuclear [{RuCl(Clphen)}2(tpy2ph)]2+ and its respective [{Ru(H2O)(Clphen)}2(tpy2ph)]4+ aqua complex are also fully described.

AB - A robust polymeric material constituted by chains of binuclear aqua ruthenium terpyridylphenanthroline complexes connected through benzene ring meta-positions, exhibiting an unusual two electrons and two protons PCET (proton-coupled electron transfer) process and enhanced oxygen evolution reaction (OER) activity, is described. The catalytic active [RuV[dbnd]O] species is generated at potentials more positive than +1.5 V (NHE) in the poly-[{Ru(H2O)(phen)}2(tpy2ph)] film, as confirmed by the rise of the ruthenyl (RuV[dbnd]O) stretching band at 810 cm−1 in the Raman spectrum, and the clear change to a higher activity regime as confirmed by EIS. Faradaic efficiency for OER as high as 39% was achieved at +1.8 V, indicating that poly-[{Ru(H2O)(phen)}2(tpy2ph)] is one of the most active ruthenium terpyridine complexes ever prepared. The synthesis and characterization of the monomeric binuclear [{RuCl(Clphen)}2(tpy2ph)]2+ and its respective [{Ru(H2O)(Clphen)}2(tpy2ph)]4+ aqua complex are also fully described.

KW - Binuclear catalyst

KW - Electrocatalysis

KW - High valence complex

KW - Modified electrodes

KW - Oxygen evolution reaction

KW - Ruthenium complex

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VL - 283

SP - 18

EP - 26

JO - Electrochimica Acta

JF - Electrochimica Acta

ER -

Polymeric binuclear ruthenium complex as efficient electrocatalyst for oxygen evolution reaction

Abstract

Keywords

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